I'm going to start off with saying I hope this is in the right section and sorry if it's not (for context I'm located in Constanta Romania) Some of the guys I work with use old helicopter radios to communicate between each other. Recently they have been having issues where seemingly randomly they get an interference where they just can't talk to each other. Originally they thought someone was holding down the talk button without knowing it, but the other day we didn't have anyone using the radios when the noise that everyone was hearing came threw so we ruled out the holding down the mic as being the problem. We have been operating on the same channel and freq for years with no issues so I don't think it's just some random person messing with us. This hasn't really affect our ability to operate so I'm not looking for a fix more just curious if anyone has had this same problem or might have an idea what's causing it.